Mantle-trimmer.



No. 695,354. lPatented Mar. Il, |902.

c. WAGNER@ w. wENmLANn. y

MANTLE TRIMMER.

(Application tiled Oei;-4 31, )2901.1 (No Model.) 2 Sheets-Sheet l.

|||H Hl niilnnl il um froHA/Ex'fs No. 695,354. Patented Mar. Il, |902 c. WAGNER & w. wENnTLAND. MANTLE TFHHMER.

(Appuwion med occ. s1, 1901.) (Nu Model.) 'ziheets-Sheet 2.

Tue uonms PETERS cu n Nirnn dramas .errar trier.

CHARLES lVAGNER AND VILHELM VENDTLAND, OF NEW YORK, IN. Y.

MANTLE-rammen.

SPECIFICATION forming part of Letters Patent No. 695,354, dated March 11, 1902.

Application tiled October 31,1901. Serial No. 80,658. (No modcl To all whom t may concern:

Be it known that we, CHARLES VAGNER and WILHELM WENDTLAND, citizens of the United States, and residents of the city of New York, borough of Manhattan, in the county and State of New York, have invented a new and Improved Mantle-Trimmer, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved machine .for accurately trimming tubular fabric bodies, such as mantlcs for incandescent gas-burners and the like, the machine being simple and durable in construction, easily manipulated and without the aid of skilled labor, and arranged to cut the fabric body without dangerof fray-` ing the edges thereof.

The invention consists of ,novel features and parts and combinations of the same, as will be fully described hereinafter and then pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings, forming a partof this specication, in which similar characters of reference indicate corresponding parts in all the views.

Figure lis a reduced front elevation of the improvement. Fig. 2 is a side elevation of part of the same. Fig. 3 is a sectional plan View of the same on the line 3 3 of Fig. l. Fig. 4t is a like view of the same on the lineec of Fig.5,parts being shown in different positions. Fig. 5 is a sectional front elevation of the same on the line 5 5 of Fig. 4. Fig. Gis a sectional plan View of the same on the line (i G of Fig. 5; and Fig. 7 is alike View ofthe same, showing the knives in the final position.

A mandrelA of conical shape is carried on the upper end of a rod B, held vertically ad- ,instable on a carrier C, secured to a standard D or other support. In the apex end of the mandrel A is arranged an upwardly-extending support for a mantle or other tubular fabric to be trimmed by the machine, the said support consisting, preferably, of a screwrod E, screwing axially in the apex end ofthe mandrel A to permit vertical adjustment of the screw-rod E for mantles of different lengths. A j ani-nut E screws on the screwrod E against the apex of the mandrel A to lock the screw-rod in place after the desired vertical adjustment is made. On the upper end of the screw-rod ,E is arranged a head E2 for receiving the asbestos-supporting bar in the upper contracted end of the mantle. The lower end of the mantle is trimmed at the base end of the mandrel A by sets of knives F F, arranged to slide radially in a bearing G and having their half-round cutting edges located in a horizontal plane extending through the base of the mandrel A. The knives in the set of knives F are arranged alternately relative to the knives in the set of knives F, and the said set of knives F is rst caused to slide inwardly to cut into parts of the mantle, and the said knives are caused to recede a short distance without, however, disenga-ging the mantle, and then the other set of knives F is caused to advance to cut the remaining portion of the mantle, and thereby complete the trimming operation. By causing the first set of knives F to recede a short distance snfcient room is made for the second set of knives to advance and complete the trimming without causing the cutting edges of the knives F to clash with the cutting edges of the knives F. The said knives F by remaining in engagement with the mantle hold the latter in position on the mandrel A, so that the advancing knives F cut the mantle in the same plane as did the knives F to insure perfect trimming of the mantle without the slightest danger of fraying the edge of the mantle. When the eut is made, both sets of knives F and F are vcaused to recede to a starting position.

In order to give the necessary motion to the sets of knives, a cam H is provided, having sets of cam-grooves H and H?, of which the grooves H are engaged by friction-rollers F2, carried by the knives F, and the grooves H2 are engaged b vfriction-rollers F3, carried by the knives F. The grooves H and H2 are so formed (see Fig. 4) that on turning the camv H in the direction of the arrow a the knives F remain stationary for the time being, while the knives F are advanced to eut the fabric and are then caused to recede a short distance, after which the knives F are advanced to complete the trimming. When the cam H is caused to turn in the inverse direction of the arrow a', the knives F and F are returned to their starting position. The cam H is concentric to the mandrel A and has its hub H3 mounted to turn on the hub G of the bearing G, carrying the knives F and F. The hub G is secured in the carrier C by a setscrew or other means. On the hub H3 of the cani H is secured or formed a segmental bevel gear-Wheel I, in mesh with a like gear-wheel l', secured to the inner end of a rock-shaft J, mounted to turn in a suitable bearing on the carrier B. On the outer end of the rock-shaft J is attacheda lever-arm K, connected at one end by a link L to a treadle N, and the other end of the said lever-arm K is connected with a spring O. When the operator presses the treadle N, a swinging motion is given to the lever-arm. K against the tension of the spring O, and the rock-shaft .I is rocked in one direction to cause the gear-Wheels I' and I to impart a turning motion to the cam Hin the direction of the arrow a". When this takes place, the cam causes the sets of knives F and F to trim the mantle, as previously explained, and when this has been done the operator releases the pressure on the treadle N to permit the spring O to return the several parts to a normal position-that is, to cause the knives F and F to recede into a starting position.

Having thus described our invention, We claim as new and desire to secure by Letters Patent- 1. Atubular-fabric-trimmingmachine,com prising a mandrel, and sets of knives operating in conjunction with the said mandrel for trimming the tubular fabric, one set of knives being arranged to advance and cut a portion of the fabric and hold the latter in position on the mandrel, and the other set being arranged to advance and cut the remaining portion of the fabric, as set forth.

2. Atubular-fabric-trim ming machine,com prising a mandrel, sets of knives operating in conjunction with the said mandrel for trimming the tubular fabric, the knives being disposed in a plane at anglesto the axis of the mandrel, and means for actuating the knives to move one set first in engagement with the fabric to cut a portion thereof, and to hold the fabric locked in position on the mandrel for the other set of knives to cut the remaining portion of the fabric, as set forth.

3. Atubular-fabric-trimming machine,com prising a mandrel, sets of knives operating in conjunction with the said mandrel for trimming the tubular fabric, the knives being disposed in a plane at angles to the aXis of the mandrel, and means for actuating the knives to move one set first in engagement With the fabric to cut a portion thereof, and then recede a short distance to hold the fabric locked in position on the mandrel, the said means then causing the other set of knives to advance and cut the remaining portion of the fabric, as set forth.

4. Atubular-fabric-trim ming machine,com prising a mandrel, sets of knives operating in conjunction with the said mandrel for trimming the tubular fabric, the knives being disposed in a plane at angles to the axis of the mandrel, and means for actuating the knives to move one set first in engagement with the fabric to cut a portion thereof, and then recede a short distance to hold the fabric locked in position on the mandrel, the said means then causing the other set of knives to advance and cut the remaining` portion of the fabric, the knives then receding simultaneously to a starting position, as set forth.

5. A tubular-fabric-trimming machine,com prising a mandrel, a support for carrying the tubular fabric, sets of radially-sliding knives and a cam mounted to oscillate, and having different sets of grooves for engaging projections on the knives to impart movement to the latter, one set of cam-grooves being formed to cause one set of knives to first advance and then recede part way, the other set of grooves then causing the other set of knives to advance and then recede With the first set to starting position, as set forth.

G. Atubular-fabric-trimming machine,comprising a mandrel, a support thereon for carrying the tubular fabric, sets of radially-sliding knives, and a cam mounted to turn and having sets of cam-grooves for engaging projections on the knives to impart movement to the latter, the sets of cam-groo ves being so arranged that one set actuates one set of knives, to cause the latter to first advance for partly trimming the fabric, and then recede part Way for holding the fabric, While the other set of knives advances and completes the trimming of the fabric, as set forth.

7. A tubular-fabric-trimmi ng machine,com prising a mandrel, a support thereon for carrying the tubular fabric, sets of radially-sliding knives, a cam mounted to turn and having sets of cam-grooves for engaging projections on the knives to impart movement to the latter, the sets of cam-grooves being so arranged that one set actuates one set of knives, to cause the latter to first advance for partly trimming the fabric, and then recede part way for holding the fabric, While the other set of knives advances and completes the trimming of the fabric, manually-controlled means for turning the said cam in one direction, and a spring device for returning the cam, as set forth.

In testimony whereof We have signed our names to this specification in the presence of two subscribing witnesses.

CHARLES WAGNER. WILHELM VENDTLAND.

Witnesses:

JOHN I-I. WELCH, ANDREW T. DALY.

ICO

IIO 

